<tr>
  <th class="align_left header <%= sortable_class('subject') %>"><%= sortable('subject',t('views.clients.subject')) %></th>
  <th class="align_left header <%= sortable_class('recipient') %>"><%= sortable('recipient',t('views.clients.recipient')) %></th>
  <th class="align_center header <%= sortable_class('type') %>"><%= sortable('type',t('views.clients.type')) %></th>
  <th class="align_center header <%= sortable_class('date') %>"><%= sortable('date',t('views.clients.date')) %></th>
</tr>